自定义监听接口

来源：互联网发布：程序员文本编辑器编辑：程序博客网时间：2024/04/25 00:44

本文章主要实现自定义view 进行自定义监听接口实现点击，移动，抬起是触摸的坐标

1：首先自定义view

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

public class Myview extends View {
private OnDownActionListener down=null;
private OnMoveActionListener move=null;
private OnUpActionListener up=null;
public Myview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}

public Myview(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

public Myview(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
  // TODO Auto-generated method stub
  super.onDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
  int x,y;
  if (event.getAction()==MotionEvent.ACTION_DOWN) {
   x=(int) event.getX();
   y=(int) event.getY();
   if (down!=null) {
    down.OnDown(x, y);
   }
   return true;
  }else if (event.getAction()==MotionEvent.ACTION_MOVE) {
   x=(int) event.getX();
   y=(int) event.getY();
   if (move!=null) {
    move.OnMove(x, y);
   }
  }else if (event.getAction()==MotionEvent.ACTION_UP) {
   x=(int) event.getX();
   y=(int) event.getY();
   if (up!=null) {
    up.OnUp(x, y);
   }
  }
  return super.onTouchEvent(event);
}

public OnDownActionListener getDown() {
return down;
}

public void setDown(OnDownActionListener down) {
this.down = down;
}

public OnMoveActionListener getMove() {
return move;
}

public void setMove(OnMoveActionListener move) {
this.move = move;
}

public OnUpActionListener getUp() {
return up;
}

public void setUp(OnUpActionListener up) {
this.up = up;
}

public interface OnDownActionListener{
  public void OnDown(int x,int y);
}
public interface OnUpActionListener{
  public void OnUp(int x,int y);
}
public interface OnMoveActionListener{
  public void OnMove(int x,int y);
}
}
2：定义XML

    <com.example.demo7interf.Myview
        android:id="@+id/my_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/ic_action_search" >
    </com.example.demo7interf.Myview>

</LinearLayout>

3：在activity中使用view以及监听

package com.example.demo7interf;

import com.example.demo7interf.Myview.OnDownActionListener;
import com.example.demo7interf.Myview.OnMoveActionListener;
import com.example.demo7interf.Myview.OnUpActionListener;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {
   private Myview myview;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myview=(Myview) findViewById(R.id.my_view);
        myview.setDown(new OnDownActionListener() {

   @Override
   public void OnDown(int x, int y) {
    Toast.makeText(MainActivity.this, "你点击的是down事件：坐标为:x"+x+"y:"+y, 1).show();
   }
  });
        myview.setMove(new OnMoveActionListener() {

   @Override
   public void OnMove(int x, int y) {
    Toast.makeText(MainActivity.this, "你点击的是MOVE事件：坐标为:x"+x+"y:"+y, 1).show();

   }
  });
        myview.setUp(new OnUpActionListener() {

   @Override
   public void OnUp(int x, int y) {
    Toast.makeText(MainActivity.this, "你点击的是up事件：坐标为:x"+x+"y:"+y, 1).show();

   }
  });
    }

}
ok这样就实现了

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